The game is notable for the extreme focus on the game's visuals by High Voltage Software, using a Wii-specific engine called Quantum3. Development of the game engine began in October of 2007. This engine allows for "full 16-TEV stage material pipeline using up to eight texture sources and a host of innovative blend operations," and as also quoted in IGN's exclusive look at the game, the engine "allows the developer to create graphic effects normally seen on other consoles with vertex and pixel shaders." These effects include bump-mapping, reflection and refraction, light and shadow maps and projections, specular and Fresnel effects, missive and iridescent materials, advanced alpha blends, gloss and detail mapping, motion blur, interactive water with complex surface effects, and animated textures, among other things. The Quantum3 engine also includes advanced artificial intelligence, allowing for enemies in the game to possess "human-like behavior." According to Eric Nofsinger, "Our [High Voltage Software's] goal is to be the most technically innovative Wii developer on the planet."

During E3 2008, the developer debuted a playable demo of the game which consisted of the first half of a level included in the actual game and showed several of the Drudge enemies, as well as several different human and alien weapons. Environmental effects showcased in the demo included reflections in glass objects such as windows and the scope of the player's weapon, water effects, and textures.


Source: Wikipedia